Trying to make as overpowered a Skyrim character as possible (I am doing this out of boredom and though meh could be fun) I made a mistake and added all the shouts rather than unlocking (new to console commands, didn't realize they were different) so I added like 50 dragon souls with console commands, and can't use them. Help would be appreciated :)
There are a few things occurring that may prevent you from spending the souls:
You added the shouts to your character (And they're already unlocked and as such you can't spend souls because you have no more shouts to unlock).
If you haven't done the Dragon Rising Quest, you can't unlock the first word of Unrelenting Force (Fus). This also happens for all shouts that are taught to you, as in: you get them during the story
You don't know how to unlock shouts. In that case, you have to open the magic Menu, click on shouts, and press R when you're over the shout you want to unlock. Spend the dragon soul. You can then equip the shout with **
If it's the latter it may be a duplicate of this question